Based on molecular dynamics simulations, the formation possibility of
molecular junctions between two tailored graphene sheets under ultrafast
laser irradiation was investigated. It was found that single layer
graphene sheet can survive under significantly high intensity of laser
beam. The fluctuations of graphene sheets in the plane and out of plane
under laser irradiation provided the "driving power" for the possible
joining process. The relative position of two graphene sheets can
influence the joining difficulties and this influence was found to be
attributed to the dangling bonds of edges. The saturation of dangling
bonds can prompt the self-assembly of carbon networks in the joining
area and lead to the connection of two graphene sheets.